Sewer-trap



H. w. NAGEL.

' SEWER TRAP.v

v APPLICATION FILED IIIN.20l ISI/I9.

. 1, 351,677; Patented Aug. 31,1920,

Imfemo1- jcp, 2. wofmy- UNITED STATES Nr OFFICE.

HENRY W. NAGEL, 0F CHARLESTON, SOUTH CAROLINA.

' SEWER-rmi?.

Application led January 20, 1919. Serial No. 272,070. y

Y larly to sewer traps.

One object of the present invention is to provide a novel and'improved trap for use in gutters which will readily permit the exit oi? water and trash, but which will preventl the escape of the gases from the sewage.

Another object is to provide a novel and improved door for the trap which will be easily' opened by the water from the gutter, but which will immediately and eectively close to prevent the escape of the sewer gases. 1 d a A further object resides in the provision of novel means for insuring the closing of the door should the saine be opened to'a slight extent and have a tendency to remain in such position.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing; l

Figure 1 is a top plan view of the trap-in position in a gutter. n Y

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1.v

Fig. 3 is a horizontal sectional view taken on the line 3 3 of Fig. 2,v looking upwardly in the direction of the arrows to show the manner of pivotally mounting the door.

Fig. 4 is a horizontal sectional view taken on the line M of Fig. 2, looking downwardly in the direction ofl the arrows to show the manner in which the curved guard plate is set in the casing of theltrap.

' Referring particularly to the accompanying drawing, 10 representsv a metal casing the upper and lower ends of which are open. Seated on the ledge 11, in the upper end of the casing, is a metal grating 12, which is disposed on a level with, or slightly below the level of the gutter. Two opposite sides of the casing have their lower portions cut projecting inwardly Y from each of these sides, at' points slightly inwardly of the apexes' of the-notches, are the pivot pins 14. In each ofsaid sides, and in the upper por'- tionthereof, there is formed the curved and downwardly extending shoulder 15,' the lower end or' which communicates with the upper end of Vthe groove 16. A curved guard plate 17 is slipped downwardly and inwardly on these shoulders and has the side edges, at their lower portions engaged in said grooves, whereby said guard plate will be firmly and properly held in place within the casing to direct the water and other ma` terial from the gutter, through the casing.

A- door18 is disposed obliquely in the casing, Ythe lower endV engaging with the lower edge of the wall at the outer end of the notch, while the upper end rests against the upper portion of the opposite wall. A narrow plate'19 is bolted to the lower face of the upper end of the door, and in the lower.

edge or' this plate there is formed a longituout to form the V-shapedl notches 13, and I.

dinal groove 20the end portions of which engage with the pins 14, whereby the door y is pivotally hung on said pins, but capable of being quickly and easily removed by swinging the door into vertical positionk and then lifting the door 'from the pins. Con* nected to the upper end of the bolt 21, which holds the plate 19 on the door, is a coil or other spring 22, the upper end of which is adapted to'engage withV the lower'L face of the guard plate 17 to serve the purpose cfa buer, and to impart an initial `closing Y movement to the door.

The spring 22 also serves to prevent the door from swinging into la vertical position which would render it liable to unseating Y from the pins 14. It will be readily understood that under the weight and pressure of the water against the door, the spring is under compression against the guard plate 17, and when this weight is released the vspring Vwill expand and start the door toward closed position.

It will also be noted ythat the lower portions of the side edges of the door extend outwardly through the notches l13 and bear against the upper walls of said notches when said door is in normal closed position. The shoulders 23, formed by these lateral extensions oi' the door, effectively prevent dis placement of the door from the supporting pivot pins. The shoulders are, however, so

formed that when the guard plate is re-y moved the door can be svmng into a vertical position, when the door can be lifted 'from the pins, and then by a forward bodily movement of the door, the samev canl be' from swinging into this vertical position,

and thus the door is effectively held in piv-l otal position within the casing.

It will be noted that the brick-work of the sewer entrance 24, below the tra is built toincliner in an undercut manner t ereby permitting the door to easily swing into its full open position. Y f

What is claimed is: p Y l Y A sewer trap comprising an open-ended casing having `curved grooves in the inner faces of two of its opposite walls, a curved guard plate engaged in said grooves and,

extending into the casing, the lower por-` tions' of said grooved walls being cut out and formed with step shoulders, inwardly extending pins carried by" said walls, and a door having an inner thickened end portion formed with a longitudinal groove arranged to receive the said pins and whereby said dooris pivotally supported in the casing, the said thickened p ortioniof the door lying beneath lthe curved guard plate, and a spring carried by said thickened portion andk arranged to be compressed against said guard plate when thev doorisA swung open and to expand to impart an initial closing movement tothedoor when pressure is lreleased from the door. n

In testimony whereof I atl/ix my signature in the presence of two witnesses.

. .HENRY w. NAGEL.

I lVitnesses 

